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Eng. Andres
Eng. Andres, Engineer
Category: Electronics
Satisfied Customers: 68
Experience:  Electronic Eng. Electronics Specialist. Circuit designer
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Panasonic Viera TX32LMD70. Problem: switches itself off a few

Customer Question

Panasonic Viera TX32LMD70. Problem: switches itself off a few minutes after power up. Sometimes it powers itself up again or goes into standby. No obvious visual fault (i.e. swollen capacitors) on either AV board or power board. Which is it likely to be or should I replace both?
Submitted: 4 years ago.
Category: Electronics
Expert:  Shahid replied 4 years ago.
Hello, my name is Shahid, I'll be happy to assist you.
Please allow me to ask you a few questions to diagnose the problem.

- Can you please check standby (5V or 3.3V) volts at power supply board with voltmeter?
- Does standby volt stay constant or goes low at some time when problem occurs?


Expert:  TV-Tech1 replied 4 years ago.

Hello, I'm TV Tech1 and I'll be working with you to identify and help you resolve your problem.


So your TV may just turn on and then off, but other times it turns off, then restarts?


Part of the situation I try to identify is if the TV turns off BEFORE the LCD panel goes from pitch black to a subtle gray light level on the TV screen. Or does it light up a little, then goes out and shuts off.


Your TV has a power supply, and another board called an inverter to make the TV lamps light up. I usually try to see if the inverters are at least lighting up or not.